Season 18 Episodes for Doctor Who
Episode 2 - The Leisure Hive - Part Two
Part two of four. The Time Lord is intrigued by a de-ageing machine which is responsible for the death of a human tourist after it is apparently sabotaged

Episode 3 - The Leisure Hive - Part Three
Part three of four. The Doctor is aged by 500 years after stepping into the sabotaged Tachyon machine

Episode 4 - The Leisure Hive - Part Four
Part four of four. The Time Lord struggles to prevent all-out war on the planet Argolis, while also trying to reverse his rapid ageing

Episode 5 - Meglos - Part One
Part one of four. The Doctor is caught in a time loop when he ventures near the planet Tigella, where two alien races battle it out to control a vital power source

Episode 6 - Meglos - Part Two
Part two of four. An evil alien cactus impersonates the Time Lord so he can steal the Dodecahedron which controls the power of the planet Tigella

Episode 7 - Meglos - Part Three
Part three of four. The Time Lord battles his cactus doppelganger as Romana attempts to escape the Gaztaks

Episode 8 - Meglos - Part Four
Part four of four. The Doctor plays the imposter at his own game in order to end the bloodshed on the planet. Tom Baker and Lalla Ward star

Episode 9 - Full Circle - Part One
Part one of four. The Time Lord enters an alternate universe and tries to convince a planets passive inhabitants they can break free of their deceitful leaders. Sci-fi adventure, starring Tom Baker

Episode 10 - Full Circle - Part Two
Part two of four. The Time Lord continues to help the passive residents of E-Space in their battle with marsh men

Episode 11 - Full Circle - Part Three
Part three of four. The colonists are evacuated to the crashed Starliner when Mistfall comes and the alien creatures prepare to attack. Tom Baker stars

Episode 12 - Full Circle - Part Four
Part four of four. The Marshmen invade the ship, and the Time Lord makes a starling deduction after examining their DNA

Episode 13 - State of Decay - Part One
Part one of four. The Time Lord discovers a backward planet is controlled by three malevolent vampires

Episode 14 - State of Decay -Part Two
Part two of four. The Time Lord continues to learn the secret of the Tower

Episode 15 - State of Decay -Part Three
Part three of four. Time Lord realises who the three vampires really are, and Adric is put into a hypnotic trance and named as one of the chosen ones

Episode 16 - State of Decay -Part Four
Part four of four. The Time Lord recalls stories of vampires from the Gallifreyan archives hoping to find a means to defeat the evil lurking under the Tower

Episode 17 - Warriors Gate - Part One
Part one of four. The Tardis is trapped in null space along with a vessel containing an enslaved race, the Tharils. Tom Baker stars

Episode 18 - Warriors Gate - Part Two
Part two of four. A desperate alien hijacks the Tardis to get help for his enslaved race, the Tharils. Tom Baker stars

Episode 19 - Warriors Gate - Part Three
Part three of four. Time begins to change for the Time Lord trapped in null space with a race of slaves

Episode 21 - The Keeper of Traken - Part One
Part one of four. The ruler of a perfect world where evil shrivels up and dies asks the Doctor to supervise the choice of his successor - but his task is complicated by an old enemys corruption of the planets ruling council. Tom Baker, Sarah Sutton and Anthony Ainley star in a Shakespearean sci-fi tale

Episode 22 - The Keeper of Traken - Part Two
Part two of four. Adric thinks he recognises strange energy readings as the Time Lord tries to learn the truth about the role of Keeper. Starring Tom Baker and Matthew Waterhouse

Episode 23 - The Keeper of Traken - Part Three
Part three of four. The Doctor is captured by the Fosters, but the Time Lord starts to see signs of a greater master plan behind events

Episode 24 - The Keeper of Traken - Part Four
Part four of four. The Melkur statue reveals its true form when the plan to become Keeper is not as successful as hoped. Starring Tom Baker

Episode 25 - Logopolis - Part One
Part one of four. The Doctor attempts to repair the faulty mechanism which is meant to change the Tardiss outside appearance - and lays himself open to an attack by the Master which threatens the foundations of the entire universe. Tom Baker makes his final appearance as the Time Lord, supported by Sarah Sutton, Anthony Ainley and newcomer Janet Fielding

Episode 26 - Logopolis - Part Two
Part two of four. Tegan makes her way to the Tardis control room, while the Time Lord attempts to flush out the more dangerous intruder

Episode 27 - Logopolis - Part Three
Part three of four. The Masters plan threatens the destruction of the whole universe, as Nyssa finds the man she believes to be her father

Episode 28 - Logopolis - Part Four
Part four of four. The Master and the Doctor return to Earth to try and save the Universe. Tom Baker stars